I admit, Yu-Gi-Oh was a sore spot for me for a long time before I realized I could use it for learning. I taught Chase to read with dinosaur-themed workbooks and simple math operations using his dinosaur collection as manipulatives. Yu-Gi-Oh was another tool waiting to be used. I truly believe that anything can be used to teach. Sometimes it takes a little time to figure out how best to turn a child's obsession into educational material, but it's worth it, because the interest inspires learning.